Enhance game over scene: implement GameOver class with options for retry and main menu, add background image, and handle mouse and keyboard interactions.

game/enemy/handler.rb

@@ -18,7 +18,7 @@ class EnemyHandler
   def spawn!
     # For now, just spawn a single enemy at a fixed location
     start_room_coords = $bus.get(:start_room_coords)
-    if @enemies.empty?
+    if @enemies.empty? && start_room_coords
       @enemies << Force.new((start_room_coords[0] * 2 + 1 + 4) * 60 + 30, (start_room_coords[1] * 2 + 1 + 4) * 60 + 30)
     end
   end

game/hud/health.rb

@@ -8,7 +8,10 @@ class HealthBar
 
   def take_damage(amount)
     @health -= amount
-    @health = 0 if @health < 0
+    if @health <= 0
+      @health = 0
+      $bus.emit(:change_scene, GameOver)
+    end
   end
 
   def heal(amount)
@@ -16,12 +19,12 @@ class HealthBar
     @health = @max_health if @health > @max_health
   end
 
-  def draw(x, y)
+  def draw
     # Draw the background of the health bar (red)
-    Gosu.draw_rect(x, y, 100, 10, Gosu::Color::RED)
+    Gosu.draw_rect(30, 10, 100, 10, Gosu::Color::RED)
 
     # Draw the foreground of the health bar (green) based on current health
     health_width = (health.to_f / max_health) * 100
-    Gosu.draw_rect(x, y, health_width, 10, Gosu::Color::GREEN)
+    Gosu.draw_rect(30, 10, health_width, 10, Gosu::Color::GREEN)
   end
 end

game/hud/layer.rb

@@ -17,7 +17,7 @@ class HUDLayer
     @hud_bg.draw(0, 0, Float::INFINITY)
 
     @inventory.draw
-    @health.draw(10, 10)
+    @health.draw
 
     @hud_fg.draw(0, 0, Float::INFINITY)
   end

game/weapons/lorentz_field.rb

@@ -1,16 +1,17 @@
 class LorentzField
   BASE_TIME = 25 # Base time for the field to be active in seconds
 
-  def initialize
+  def initialize(bus)
+    @bus = bus
     @time = 0
     @active = false
     @font = Gosu::Font.new(24, name: "assets/fonts/tn.ttf")
 
-    $bus.on(:lorentz_field?) do
+    @bus.on(:lorentz_field?) do
       next @active
     end
 
-    $bus.on(:lorentz_field) do
+    @bus.on(:lorentz_field) do
       if @active
         t = @time
         remaining = BASE_TIME - t
@@ -33,10 +34,10 @@ class LorentzField
 
   def attack(_direction)
     return if @active
-    $bus.emit(:consume, :lorentz_field, 1)
+    @bus.emit(:consume, :lorentz_field, 1)
     @active = true
     @time = 0
-    $bus.emit(:lorentz_field!, true)
+    @bus.emit(:lorentz_field!, true)
   end
 
   def update(dt)
@@ -46,7 +47,7 @@ class LorentzField
     if @time >= BASE_TIME
       @time = 0
       @active = false
-      $bus.emit(:lorentz_field!, false)
+      @bus.emit(:lorentz_field!, false)
     end
   end